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Career
Ordered:
Laid down:
Launched:	1 December 1944
Commissioned:	31 March 1945
Fate:	loaned to Pakistan, lost during war with India
Homeport:
Stricken:
General characteristics
Displacement:	1570 tons surfaced, 2414 tons submerged
Length:	311 feet 8 inches
Beam:	27 feet 4 inches
Draft:	15 feet 3 inches
Propulsion:	diesel-electric reduction gear with four Fairbanks Morse main generator engines, 5400 hp, Fuel Capacity, 113,510 gallons, two Elliott main motors with 2740 hp, two 126-cell main storage batteries, two propellers.
Speed:	20.25 knots surfaced, 8.75 knots submerged
Range:	11,000 miles surfaced at 10 knots (19 km/h), 48 hours submerged at 2 knots (4 km/h)
Depth:	400 feet
Complement:	7 officers, 69 men
Armament:	ten 21-inch (533 mm) torpedo tubes (six forward, four aft), 24 torpedoes, one five-inch/25-caliber gun, two 20 mm cannon, two .30-caliber machineguns
Motto:

USS Diablo (SS/AGSS-479), a Tench-class submarine, was the only ship of the United States Navy to be named for the diablo, a member of the batfish family, common in the West Indies and along the southern coast of the United states. Her keel was laid down by the Portsmouth Navy Yard. She was launched on 1 December 1944 sponsored by Mrs. V. D. Chapline, and commissioned on 31 March 1945 with Lieutenant Commander G. G. Matherson in command.

Diablo arrived at Pearl Harbor from New London, Connecticut, on 21 July 1945. She sailed for her first war patrol 10 August with instructions to stop at Saipan for final orders. With the cease fire, her destination was changed to Guam where she arrived 22 August. On the last day of the month she got underway for Pearl Harbor and the East Coast arriving at New York City on 11 October. Except for a visit to Charleston, South Carolina, in October, she remained at New York until 8 January 1946.

From 15 January 1946 to 27 April 1949 Diablo was based in the Panama Canal Zone participating in fleet exercises and rendering services to surface units in the Caribbean Sea. From 23 August to 2 October 1947 she joined Cutlass (SS-478) and Conger (SS-477) for a simulated war patrol down the west coast of South America and around Tierra del Fuego. The three submarines called at Valparaíso, Chile, in September while homeward bound. Diablo sailed to Key West, Florida, for antisubmarine warfare exercises, from 16 November to 9 December 1947, and operated from New Orleans, Louisiana, for the training of naval reservists in March 1948.

Diablo arrived at Norfolk, Virginia, her new home port, 5 June 1949, and alternated training cruises with duty at the Sonar School at Key West. Her home port became New London in 1952 and she arrived there 17 September to provide training facilities for the Submarine School. From 3 May to 1 June 1954 she was attached to the Operational Development Force at Key West for tests of new weapons and equipment. She participated in Operation "Springboard" in the Caribbean from 21 February to 28 March 1955, and continued to alternate service with the Submarine School with antisubmarine warfare and fleet exercises in the Caribbean and off Bermuda, as well as rendering services to the Fleet Sonar School and Operational Development Force at Key West. Between February and April 1959 she cruised through the Panama Canal along the coasts of Colombia, Ecuador, Peru, and Chile for exercises with South American navies. On 27 May 1960 she entered Philadelphia Naval Shipyard for an overhaul which continued through October 1960.

In 1962, her hull classification symbol was changed to AGSS-479.

In 1963, Diablo was transferred to the Pakistan on a four-year lease under the terms of the Security Assistance Program. After an extensive overhaul and conversion to Fleet Snorkel configuration in the United States, she was commissioned into the Pakistani Navy as PNS Ghazi on 1 June 1964. She reported for duty in Karachi in September of that year.

Ghazi served during the Indo-Pakistani War of 1965 until she was lost in the 1971 war with all hands on 4 December 1971 just inside the outer channel buoy at Vishakapatnam. India states that the destroyer INS Rajput destroyed her with a depth charge attack; Pakistan states that she was destroyed by one of the naval mines she was lying in the harbor.

This article includes text from the public domain Dictionary of American Naval Fighting Ships.